{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-hpaiw4az","versions":[{"created_at":"2026-07-17T19:41:05Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"15e8970f5c02febb21a6b6e384882c31655e3be213aea464767ad9d3b3e84a93","version":3},{"created_at":"2026-07-17T19:31:27Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f95107be0e9effdeb73d94b4d19eea1a8b6c69a60a5a5f72477f79f3cfd10af9","version":2},{"created_at":"2026-07-17T19:31:25Z","element_count":130,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}